A man pulls up to a gas station and pumps his car full of almost $6 worth of gas, but is careful not to go over. He then goes inside the station and pays with a $20 bill. He goes to another station, pumps almost $6 again and pays with $10 in change from the last stop. He repeats the process several times at other stations. At the last station he uses the ATM to withdraw a couple more twenties, and leaves to his destination.

Distance between stations relevant? Is his gas tank full after he has pumped for almost $6? Is there something wrong with the car? Is he doing some sort of experiment? Research? Would something bad happen if he pumped for $7? Is he trying to get around some sort of limitation? If so: physical? Financial? Legal? Spousal? Is a bet relevant?

Distance between stations relevant? no Is his gas tank full after he has pumped for almost $6? no Is there something wrong with the car? no Is he doing some sort of experiment? no Research? no Would something bad happen if he pumped for $7? yope. it'd be an inconvenience. Is he trying to get around some sort of limitation? no Is a bet relevant? no

Does he need a certain combination of bills? Is he trying to use up a certain number or type of bills? Is his gas tank large enough to take $20 worth of gas? Relevant? Price of gas relevant? Is he trying to leave a certain amount of gas in the tank at the end?

Is the amount of change relevant? yes The number of bills? yes Whether he will get any coins? no Is he in the US? yes, but if he were in Canada with Canadian dollars it wouldn't change anything or even if he was using Pounds or Euros in a proper country. Are they US dollars? yes but see before Does it help to know which denominations exist of the bills? yes Or coins? no

Does he need a certain combination of bills? no Is he trying to use up a certain number or type of bills? no Is his gas tank large enough to take $20 worth of gas? yes Relevant? not really Price of gas relevant? no Is he trying to leave a certain amount of gas in the tank at the end? no

Is he trying to accumulate twenty 1s?no Relevant just how many 1s? Not really. He just needs a lot. Is he going to exchange the 1s for something later? yesish. Depends on what you mean by "something" Or does he need them to make change? no

Is he going to a strip club? Somewhere else where you usually tip with 1s?

Going to a poker game? Some other type of betting scenario? (I used to play poker games that had 10 dollar buy ins...so many people would show up with 20s and 10s and then when we all tried to cash out we had no way of walking with 14 or 7, etc, so I always bought in with ones to help at the end of the night}